Photographic-printing frame



UNITED STATES nPATaiarT arten.

FRANCIS BURROIYS, OF PEOItIA, ILLINOIS.

PHOTCGRAPHlC-PRINTING FRAME.

.Specitcation form'ng part of Letters Patent No. 43,83 l, dated August1G, 1864.

clear, and exact description of the construction i and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, in which- Figure 1 is a perspective view ot' my fullviewphotographic-printing frame. Fig. 2 is the vignette attachment to thesame. Fig. 2, B is atransverse section ofthe same. Fig. 3, a plan of thephotographic-printing frame, and Fig. 4 a transverse section ot thesame.

Fig. lis the complete apparatus with the shutter D opened, disclosingthe principal arrangement.

A is the frame into which the padded shutter D closes ush with thei'rame, which frame may require, preserving the relative proportionsofthe drawings.

B is the diaphragm holding the negative E. The diaphragm is securedwithin the traine A by the clasps c a, which are screwed to the fra-meand sunk into the diaphragm from one-eighth to one-fourth of an inch,allowing pressure ot' the padded shutter D. Under each corner is aspiral or elliptic spring, c c c c,

I) and the silvered paper F. The recess within the diaphragm on whichthe negative rests is lined with rubber, cloth, or other elasticmaterial at dy d d, to secure an equal pressure rIhc depth of this restson the springs c c c e, before mentioned, i

which elevates the same from oneeighth to C is a clasp, which holds boththe negative and the silvered paper in contact while printing. The paperis inserted and removed at pleasure by pressing the outer edge of theclasp downward against another set of spiral 3 soften sunshine. for thepurpose ot'pressingthe diaphragm and l negative within it against thepadded shutter 'or other springs, c c, placed between the under side ofclasp and the diaphragm. {See section at Fig. et.) These springs slideon posts or guides let into the clasp. The clasp moves on spindles ateach end, b 7), screwed to the diaphragm.

I) is a shutter padded with cotton or rubber or other elastic material,raised in the center to fit into recess ot frame A against thediaphragm, and hung on hinges, and shutting down flush with the frame A,and fastening with the sliding spring h or snap at g.

Fig. 2 is the vignette attachment, which is fastened to the t'rame A,Fig. l, by hooks y"', (as represented in Fig. l at G,) or similart'astenings.

II H is a movable panel, sliding freely within the interior of the tramein the recess, (marked t' i in the transverse section B, Fig. 2,)provided with an aperture, I of size ot' portrait, with a beveled edge(blackened) wid' ening or opening three-fourths inch inward may be madeof any size that convenience toward the negative, to which it approacheswithin one-sixteenth ot'an inch, when the shutter D is closed on thediaphragm, and varying to one-fourth inch when the shutter opens. rIheouter edge ot' the beveled opening falls back ata right angle to thepanel II Il, for the i purpose ot' giving play to the panel andadjusting thc aperture to the portrait or negaroom for the diaphragm torise and tall with tive. A ground-glass slide, I, moving in a groove,tits over the aperture at pleasure to Ihe panel may be litted withrubber, d, at. the corners, to prevent sliding after adjustment, and maybe inclosed within its recess by a metallic plate, as in section B, Fig.2, with screws.

Operation: rlo print by my apparatus, (see Fig. 1,) open the shutter Dby placing the thumb on the sliding snap, when the shutter will, by theaction of the diaphragm-springs, be forced up one-fourth inch abovesurface ot' frame A. rIhrow Ithe shutter open and place the thumb on theclasp i C, and drop the negaf tive required to print from into itsrecess in the one-fourth inch above the level of the recess in thet'rameA, in which it (the diaphragm) lies, l thus securin g pressureagainst the shutter D.

diaphragm B. Then insert between the negative and the clasp the silveredpaper F, and drop the clasp, which holds securely the negativein itsrecess and the paper at its edge next to the hingesot'theshutter.Glosetheshiitter(which will, by its pad and the action of the spring idiaphragm against the shutter, press the paper j to the nega-tive) andshut with sliding` snap.

It is now ready for printing. The whole face ot' print may, by thisarrangement, be examined at any stage of the printing by simply openingthe shutter and raising the edge of the print, which can be turned backas far as the clasp Without any disarrangement. The remoVal andsubstitution ot' another paper are momentary operations, and can be donewithout the slightest danger to the negative.

To print a vignette, hook the vignette attaohment to the back of frameA, Fig. l, With the beveled edge of opening toward negative, ofcourseplacing the opening toward the sun when ready for printing. In case ofsunshine, close the opening with the ground glass slide I.

The advantages of my apparatus consist as follows: Of an instantaneousadjustment of the negative and paper for printing, and of theexamination of the Whole print in any stage of printing Withoutdisplacing or da iger of injury or breakage to the negative, to whichthe old plan is liable. It also supersedes the trouble of replacing andadjusting the paper padding, at present used, every time the print wasexamined or removed; also the troublesome and insecure modes offastening the paper to the negative with clamps at each corner orsprings at thetop of the shutter each time of changing a print.

The advantages of the vignette attachment are, aquicker and sureradjustment ofthe vignette opening to the negative, and a perfectexclusion of all light (a very uncertain operation by the old style ofpaper diaphragms in tin vignettes,) making a perfect vignette Withexpedition and certainty, with softer or harder shades, as required, bymeans of beveled opening, much ner ,than could be obtained by formermodes.

What I claim as my improvement, and de sire to secure by Letters Patent,is-

1. A spring'diaphragm moving in a recess which is lined with elasticmaterial for the reception of the negative, substantially as described.

2. An attached hinged shutter, with stationary padding closing on Vthespring-diaphragm, secured by a latch or spring snap, or its equivalent.

3. Aremovable. vignette-panel, with beveled opening widening toward thenegative and excluding' all extraneous light, in the manner described.

FRANCIS B URROVS.

Vitnesses E. G. JoHNsoN, BERNARD BAILY.

